小场区高精度控制网维护方法

MAINTENANCE METHOD OF HIGH-PRECISION CONTROL NETWORK IN SMALL FIELD

小场区可利用空间较小,在地面上的控制点常会被建筑材料堆压或被损坏,导致场区内测量工作无法正常进行。国家会议中心二期工程施工中采用小场区高精度控制网的引进引出方法,并将GNSS静态测量与四等导线测量相结合,保证了场区内级控制网的相对精度。

The available space in the small field area is small,and the control points on the ground are often piled up or damaged by building materials,causing the measurement work in the field area cannot be carried out normally.In the construction of China National Conference Center Phase Ⅱ,the introduction and extraction method of the high-precision control network in the small field area was used,and the GNSS static measurement and the fourth-class wire measurement were combined to ensure the relative accuracy of the second-level control network in the field area.